CVE-2026-21654
Critical
Description
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Johnson Controls Frick Controls Quantum HD allows OS Command Injection. Insufficient validation of input in certain parameters may permit unexpected actions, which could impact the security of the device before authentication occurs.This issue affects Frick Controls Quantum HD version 10.22 and prior.
SeverityCritical
CVSS9.8
Exploit probability—
ProductJohnsoncontrols Frick Controls Quantum Hd Firmware
PublishedFeb 27, 2026
First seenFeb 27, 2026
Weakness typeCWE-78OS command injection
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| johnsoncontrols frick_controls_quantum_hd_firmware | v ≤ 10.22 | — |
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